Improvement in swivel-plows



2 Sheets--Sheet1- 1.. HAPGODD. Swivel-Plow.

Patented May 25,1875.

THE GRA HIC C0.PN O TO 4 111.398 PARK PLACER-Y.

UNITED STATES PATE Orrron.

J OAB HAPGOOD, OF SHREWSBURY, MASSACHUSETTS.

IMPROVEMENT IN SWIVEL-FLOWS.

Specification forming part of Letters Patent No. 163.589, dated May 25,1875; application filed To all whom it may concern:

Be it known that I, JOAB Hareoon, of Shrewsbury, in the county ofWVorcestcr and State of Massachusetts, have invented certain new anduseful Improvements in Swivel- Plows; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing bad to the accompanying drawings which form a part of thisspecification, and in which-#- Figure 1 represents a side view of aswivelplow embracing my improvements. Fig. 2 represents a bottom view ofthe cutter devices on a somewhat enlarged scale; Fig. 3, a transversesection of the beam, showing the supporting-loop; Fig. 4., the blade orcutter; Fig. 5, a rear View of the mold-board; and Fig. 6, a perspectiveview of the entire plow.

The nature of my invention consists in a peculiarly-constructedautomaticallyadjustable colter or sward-cutter device for swivelplows,as hereinafter described.

In the drawings, A denotes the beam of the plow B B, the standards; 0,the bed-piece; D, the point or share; and E the mold-board. F indicatesa lever, which I call the colter-lever, pivoted or fulcrumed in ahorizontal position to the under side of the beam A by a bolt, a, andhaving at its forward end earpieces f, to which the cutter-blade G issecurely fastened by screws or bolts, as indicated. The form in which Imake the blade or cutter G is shown by Fig. 4. of the drawings, theupper part being provided with slots 00, for the holding-bolts, and bothof its edges d d sharpened so that the cutter can be adjusted up anddown, or be reversed when one of its edges becomes dulled. The forwardend of the lever F extends beyond the ear-pieces f, and passes through asupporting loop or guide, K, rigidly secured to the under side of thebeam A in a transverse position, as shown. This loop K serves to supportthe lever F against twisting or upward and downward movement, andtransfers the strain upon cutter to the beam A, when in use, while itpermits the free movement of the lever F from side to side whenrequired. A second lever, I, which I designate the shipping-lever, isarranged in an upright position, just in front of the forward standardB, to which standard the lever is pivoted or October 27, 1873.

fulcrumed by a bolt, 1), passing through the parts in the positionindicated. The upper end of lever I is made to engage with the rear endof the colter-lever F, the latter being forked or provided with a recessfor its reception, and by the lateral movement of the shipping-lever Ithe oolter-lever F and cutter G are operated.

The operation of my improved cutter device is as follows: When themold-board is placed at the right-hand side of the beam A, the lower endof the shipper-lever I is pressed to the left, and its upper end actingupon the lever F, causes the cutter-blade Gr to be held in a positionnearly beneath the left-hand side of the beam A, and coincident with theline of cut or in front of the upright part of the share when the plowhas the proper inclination to land at that side. Then, when themold-board is reversed or changed to the left-hand side of the beam itsedges, striking upon the opposite side of the lever I, presses its lowerend toward the right, and the motion being transmitted through the leverF, swings the cutterblade G to a position nearly beneath the righthandside of the beam A, or to correspond with the line of cut as reversed,thus automatically adjusting the cutter to the proper positions forplowing right or left hand furrows.

It will be observed that my improved cutter device is very simple inconstruction, and, while it operates withease and facility, is notsubject to derangement. It will also be noticed that while the cutter Gis moved laterally to correspond with the reversing of the mold-board,the position of the cutter as regards a vertical plane is not changed,or in other words, the cutter always stands upright.

By the loop or guide K the end of the lever F and the cutter G are heldvery firmly to their work, while the lever is allowed easy movementlaterally, when the cutter is relieved from strain, or while the plow isbeing reversed.

The cutter-blade G may, if desired, be forged in a single piece with thelever F; but I prefer the construction shown and described herein.

The mold-board E of my' improved plow I construct of the form shown inFigs. 5 and 6, the central portion m thereof being curved cylindrical,the rear part divided, as at n, and and the upper parts 0 of thedivisions raised and turned outward, while the lower rear corner p iscarried well under at an angle of some thirty degrees from a verticalposition, (see dotted line, Fig. 5,) making the curve of the mold-boardsomewhat similar to the moldboard used on a land-side plow.

V By this means my swivel-plow is made to turn a flat and wide furrow,and to do as good work as a land'side plow.

in set forth.

JOAB HAPGOOD. Witnesses:

Guns. H. BURLEIGH, ALBERT A. BARKER.

